Reinforced-concrete culvert.



L H; DARRGW. REINFORCED CONCRETE GbLVERT.y

APPLICATWN FILED JUNE I9. i915.

Patent May 9, 1916.

gg Mug JOHN HEN'ERSGN DARROW', GF RBD LGLDGE, MONTANA.

RENFORCED-CONRETE CULVEET.

A i Specification of Letters Patent.

resented new aisee.

Application led .T une 19, 1915. Serial No. 35,607.

Totali 107mm it may concern Be it known that I, JOHN H. DARRow, a.citizen of the United States, and a resident of Red Lodge, in the countyof Carbon and State of Montana, have invented a new and ImprovedReinforced-Concrete Culvert, of which the following is a full, clear,and exact description.

My invention relates to culverts of the rsectional type, and hasreference more particularly to reinforced-concrete culverts in which thesection joints are staggered.

The object of the invention is to provide a simple, inexpensive, andefhcient culvert formed of upper and lower concrete sections, the jointsof which are staggered and the reinforcement of which sections isutilized as means for detachably securing the upper and lower sections.

"With the above and other objects in View, the nature of which will morefully appear; as the description proceeds, the invention consists in thenovel construction, combination and arrangement of parts as herein fullydescribed, illustrated and claimed.

ln the accompanying drawings, forming part or' the application, similar'characters of reference indicate corresponding parts in all the views.

Figure l is a side elevation of culvert sections partly sectionalized toshow the details oi' construction; Fig. 2 is a cross section through theculvert on line 2 2, Fig. l; and Fig'. 3 is a perspective view of theculvert sections showing the upper sections removed to illustrate thereinforcing means which serve the purpose of a locking device for thesections.

Referring to the drawings, each of the culvert sections is preferably inthe shape of a il channel 5 reinforced adjacent the ends by U-shapedirons (i, the ends 7 of which project out ot the longitudinal edges ot'the sections a length suiiicient to project through the sides ot thecooperating sections. The longitudinal edges oi each section have acentral depression 8, the ends of which depression are preferablybeveled, as shown at i). and the length oi which depression issiihstantially twice the length of the end portion l0 ot each section,so that two portions end to end will have their end v portions l() atthe longitudinal edge to fit snugly into the recess S of the underlying'or supcrposed section. Each oi' the sections, in addition to beingreinforced by the U-shaped irons 6, is reinforced by tubular members lllocated in the sides of the channeled section within the recesses S.These tubular members form sockets for the end 7 of the U iron 6. Theends of the tubular sections ll, at the bottom of the sections, lie 1n arecess l2 whereinto the threaded eX- tremity of the end 7 projects toreceive e.

nut 13 which bears on to the end of thetubular member ll and serves as awashed 'for said nut in addition to being a socket for the end 7. i

It will be noted from Figs. 2 and 3 that when the upper and lowersections are .in-

terconnected the joints of the sections are.

staggered and each of the recesses 8 ot each section engages the endprojections 10 of the sections cooperating therewith. K This engagementof the recesses with the"end projections prevents any longitudinaldisplaceent of the sections relative to one another, which tendency isfurther yresisted lo 1 the locking means formed by the nuts 13 at theends of the U-shapedirons 6. A lateral displacement of the sections isprevented by said reinforcingmembers 6 and l1 which. form the means forlocking the sections together.

l/llhile 1T have described the principle of operation, together with thedevice which l.;

now consider to be the best embodiment thereof, I desire to have itunderstood that the device shown is merely illustrative and that suchchanges may be made as are with; in the scope or the appended claims.

1. A reintorced-concrete` culvert consisting of a plurality of sections,each of channeled cross section, U-shaped irons reinforcing the sectionsat the ends thereof with. the ends of the irons projecting above 'thelongitudinal edges, each or" said sections having a depression in thelongitudinal edges thereof between the projecting ends orf the U-shapedirons, tubular members in the side of the channeled member within therecess ot' the longitudinal edges for engaging the projecting portionsof the il irons or" a cooperating section, and locking means associatedwith the projecting ends of the U- edges thereof, each of said sectionshaving a recess in the longitudinal edges thereof between the members,tubular members in the sides of the sections within the recess andprojectingthrough the bottom pf the section for engaging the projectingends of the U ironof a coperating section, said sections having recessesat the bottom thereof where the tubular members project, and lockingmeans associated with the ends of the reinforcing members.

3. A reinforced-concrete culvert consisting of a plurality ofcooperating sections each in the shape of a U-shapedl channel, U-shapedirons reinforcing the sections at the ends thereof with the ends of theirons projecting above the longitudinal edges of the sections, each ofsaid sections having a recess in each of the lon itudinal edges thereofbetween the projecting ends of the irons, tubular members in each sideof the l sections located within the recess of the sides, said tubularmember forming sockets for the projecting ends of the irons, saidtubular members projecting through the bottom of the sections, saidsections having a recess at the bottom thereof where the tubular membersproject, and a nut threaded on to the projecting ends of the irons.

4. A reinforced-concrete culvert consisting of a plurality of sectionseach of channeled cross section, reinforcing bars for said sectionsprojecting edges ofithc sec ions, forcing the secti ns jecting parts ofoperatin sections, and locking means associated with the projecting endsof the bars.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN HENDERSON DARRow.

Witnesses: L. C. BABoooK -I-I. K. SWEENEY.

tubular members reinfor engaging the' prothe reinforcing bars of colabove the longitudinal j

